A pendulum's first swing has an arc of 24 inches. As the pendulum swings back and forth, the arc length for each successive swing is 1/2 of the previous swing. If this pattern continues, at which swing of the pendulum will the length of the arc be less than 4 inches?
At swing number ______________ the pendulum's arc length will be less than 4 inches.
Group of answer choices
3
4
6
5